package com.hqyj.javaSpringBoot.modules.common.service.impl;

import com.hqyj.javaSpringBoot.config.ResourcesConfigerBean;
import com.hqyj.javaSpringBoot.modules.common.entity.ImageType;
import com.hqyj.javaSpringBoot.modules.common.entity.Result;
import com.hqyj.javaSpringBoot.modules.common.service.ImageService;
import com.hqyj.javaSpringBoot.util.FileUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.awt.*;
import java.io.File;
import java.io.IOException;

@Service
public class ImageServiceImpl implements ImageService {

    @Autowired
    private ResourcesConfigerBean configerBean;
    @Value("${artifactId}")
    private String artifactId;

    @Override
    public Result<String> uploadImage(MultipartFile file, String imageType) {

        // 判断文件是否为空
        if (file.isEmpty()) {
            return new Result<>(Result.ResultCode.FAILED.code, "Image is null.");
        }

        // 判断文件是否为图片
        if (!FileUtil.isImage(file)) {
            return new Result<>(Result.ResultCode.FAILED.code, "File is not image.");
        }

        // 获取图片类型枚举对象
        ImageType imageTypeMenu = ImageType.getImageTypeByName(imageType);

        // 构建目标对象绝对地址 ---- d:/upload/ + artifactId + imageType + 图片名字
        String imageName = String.format("%s.%s", System.currentTimeMillis(),
                FileUtil.getFileType(file.getOriginalFilename()));
        String destFolder = String.format("%s%s/%s",
                System.getProperty("os.name").toLowerCase().startsWith("win") ?
                        configerBean.getWindowsLocation() : configerBean.getLinuxLocation(),
                artifactId,
                imageType);
        File destFolderFile = new File(destFolder);
        if (!destFolderFile.exists()) {
            destFolderFile.mkdirs();
        }
        String absolutePath = String.format("%s/%s",
                destFolder,
                imageName);

        // 构建目标对象的相对地址 ---- /upload/ + artifactId + imageType + 图片名字
        String relatePath = String.format("%s%s/%s/%s",
                configerBean.getPath(),
                artifactId,
                imageType,
                imageName);

        try {
            // 写图片到目标对象
            File destFile = new File(absolutePath);
            file.transferTo(destFile);

            // 变更图片的尺寸 ---- 可选
            FileUtil.changeImageSize(absolutePath, absolutePath,
                    imageTypeMenu.length, imageTypeMenu.height);

            // 返回 result 对象
            return new Result<>(Result.ResultCode.SUCCESS.code,
                    "Upload image success.", relatePath);
        } catch (IOException e) {
            e.printStackTrace();
            return new Result<>(Result.ResultCode.FAILED.code,
                    "Upload image failed.");
        }
    }
}
